File:The grape leafhopper in the Lake Erie Valley (1914) (14781213461).jpg

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Description
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Identifier: grapeleafhopperi19john (find matches)
Title: The grape leafhopper in the Lake Erie Valley
Year: 1914 (1910s)
Authors: Johnson, Fred
Subjects: Grapes Diseases and pests Grape leaf-hopper
Publisher: Washington, D.C. : U.S. Dept. of Agriculture
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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Text Appearing Before Image:
Fig. 1 .—Cages Used for Rearing the Grape Leafhopper, at Laboratory, NorthEast, Pa.. 1912. (Original.)
Text Appearing After Image:
Fig. 2.—Steam-Engine Power Sprayer Used in Spraying Against the GrapeLeafhopper, North East, Pa., 1912. (Original.) THE GRAPE LEAFHOPPER. THE GRAPE LEAEHOPPEE IN THE LAKE EEIE VALLEY. 21 HATCHING OF FIRST-BROOD NYMPHS. After the finding of eggs in the tissue of the leaves on June 10. dailyexaminations of infested grape foliage were made both m badlyinfested vineyards and on vines at the laboratory. On June 18 threenvmphs were found on the badly infested foliage of a Delaware grape-vine. These nymphs were probably about a day or two old. sincethev were slightly larger than newly hatched nymphs. They hadtaken on a yellowish color, which indicated that some time had beenspent in feeding, for the newly hatched nymphs before having takenany food are white. On June 20 a number of newly hatched nymphs were found onConcord vines. After June 20 the hatching of the nymphs becamegeneral. By June 26 large numbers of them could be found in allbadlv infested vineyards in the vicinity of North Eas

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https://www.flickr.com/photos/internetarchivebookimages/14781213461/

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Flickr tags
InfoField
  • bookid:grapeleafhopperi19john
  • bookyear:1914
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Johnson__Fred
  • booksubject:Grapes_Diseases_and_pests
  • booksubject:Grape_leaf_hopper
  • bookpublisher:Washington__D_C____U_S__Dept__of_Agriculture
  • bookcontributor:U_S__Department_of_Agriculture__National_Agricultural_Library
  • booksponsor:U_S__Department_of_Agriculture__National_Agricultural_Library
  • bookleafnumber:24
  • bookcollection:usda-bulletin
  • bookcollection:usdanationalagriculturallibrary
  • bookcollection:fedlink
  • bookcollection:americana
Flickr posted date
InfoField
30 July 2014

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